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Experimental Study on Energy Dissipation of Electrolytes in Nanopores

Jianbing Zhao; Patricia J. Culligan; John T. Germaine; Xi Chen

Title:
Experimental Study on Energy Dissipation of Electrolytes in Nanopores
Author(s):
Zhao, Jianbing
Culligan, Patricia J.
Germaine, John T.
Chen, Xi
Date:
Type:
Articles
Department:
Civil Engineering and Engineering Mechanics
Volume:
25
Permanent URL:
Book/Journal Title:
Langmuir
Notes:
Reprinted with permission from Environmental Science & Technology. Copyright 2009 American Chemical Society.
Abstract:
When a nonwetting fluid is forced to infiltrate a hydrophobic nanoporous solid, the external mechanical work is partially dissipated into thermal energy and partially converted to the liquid−solid interface energy to increase its enthalpy, resulting in a system with a superior energy absorption performance. To clarify the energy dissipation and conversion mechanisms, experimental infiltration and defiltration tests of liquid/ion solutions into nanopores of a hydrophobic ZSM-5 zeolite were conducted. The characteristics of energy dissipation were quantified by measuring the temperature variation of the immersed liquid environment and compared against that estimated from pressure−infiltration volume isotherms during infiltration and defiltration stages of the test. Both stages were observed to be endothermic, with the temperature of the liquid phase showing a steady increase with changes in liquid saturation. The confinement of the molecular-sized pore space causes the liquid molecules/ions to transit between statuses of orderly and disorderly motions, resulting in dissipation behaviors that vary with liquid infiltration/defiltration rates and the types and concentrations of additive electrolytes in the liquid—both factors of which alter the characteristics of the nanofluidic transport behavior.
Subject(s):
Nanoscience
Publisher DOI:
http://dx.doi.org/10.1021/la901696t
Item views:
276
Metadata:
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